The Collaborative International Dictionary
Empetrum \Empetrum\ prop. n. A genus of heathlike shrubs including the crowberry ( Empetrum nigrum).
Syn: genus Empetrum.
Empetraceae \Empetraceae\ n. a natural family of heathlike shrubs including the crowberry ( Empetrum nigrum).
Syn: family Empetraceae, crowberry family.
Wikipedia
Empetrum nigrum, crowberry, black crowberry, or, in western Alaska, blackberry, is a flowering plant species in the heather family Ericaceae with a near circumboreal distribution in the northern hemisphere. It is also native in the Falkland Islands. It is usually dioecious, but there is a bisexual tetraploid subspecies, Empetrum nigrum ssp. hermaphroditum, that occurs in more northerly locations and at higher altitude.
Evolutionary biologists have explained the striking geographic distribution of crowberries as a result of long-distance migratory birds dispersing seeds from one pole to the other.
The metabolism and photosynthetic parameters of Empetrum can be altered in winter-warming experiments.